Hi Keith!
You bring up a very good point!
What I do is clearly label what changes have been made and try to avoid the term "digitally altered". One of my agencies actually has a box to check for images that have had modifications, which is really a good idea for the agencies! I would say that 99.9% of my images have no alterations other than sharpening, etc.
Actually, if we really think about it, all images, even snapshots, are manipulations. As a photographer, we decide what to include in the frame, and as importantly, what not to include! We decide when to trip the shutter and which images to keep and which to share (or sell). So, really all images are simply a representation of reality.
Your friend,
Jim C.
Many of the debates I have encountered haven't really been "manipulation" vs documentation, but rather purity vs "cheating". I have had students who believe that only those images that have been shot and displayed full frame without any kind of image alteration are worthwhile images and everything else is not worthy of consideration. This same debate has had roots in painting vs photography, color vs B&W, film vs digital, and so on!